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1 | use strict; |
2 | use warnings; |
3 | use Test::More; |
4 | |
5 | use lib qw(t/lib); |
6 | use DBICTest; |
7 | use DBIC::SqlMakerTest; |
8 | |
9 | #plan tests => 6; |
10 | plan 'no_plan'; |
11 | |
12 | my $schema = DBICTest->init_schema(); |
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13 | my $sdebug = $schema->storage->debug; |
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14 | |
15 | my $cd_rs = $schema->resultset('CD')->search ( |
16 | { 'tracks.cd' => { '!=', undef } }, |
17 | { prefetch => 'tracks' }, |
18 | ); |
19 | |
20 | # Database sanity check |
21 | is($cd_rs->count, 5, 'CDs with tracks count'); |
22 | for ($cd_rs->all) { |
23 | is ($_->tracks->count, 3, '3 tracks for CD' . $_->id ); |
24 | } |
25 | |
26 | # Test a belongs_to prefetch of a has_many |
27 | { |
28 | my $track_rs = $schema->resultset ('Track')->search ( |
29 | { 'me.cd' => { -in => [ $cd_rs->get_column ('cdid')->all ] } }, |
30 | { |
31 | # the select/as is deliberately silly to test both funcs and refs below |
32 | select => [ |
33 | 'me.cd', |
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34 | { count => 'me.trackid' }, |
35 | ], |
36 | as => [qw/ |
37 | cd |
38 | track_count |
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39 | /], |
40 | group_by => [qw/me.cd/], |
41 | prefetch => 'cd', |
42 | }, |
43 | ); |
44 | |
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45 | # this used to fuck up ->all, do not remove! |
46 | ok ($track_rs->first, 'There is stuff in the rs'); |
47 | |
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48 | is($track_rs->count, 5, 'Prefetched count with groupby'); |
49 | is($track_rs->all, 5, 'Prefetched objects with groupby'); |
50 | |
51 | { |
52 | my $query_cnt = 0; |
53 | $schema->storage->debugcb ( sub { $query_cnt++ } ); |
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54 | $schema->storage->debug (1); |
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55 | |
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56 | while (my $collapsed_track = $track_rs->next) { |
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57 | my $cdid = $collapsed_track->get_column('cd'); |
58 | is($collapsed_track->get_column('track_count'), 3, "Correct count of tracks for CD $cdid" ); |
59 | ok($collapsed_track->cd->title, "Prefetched title for CD $cdid" ); |
60 | } |
61 | |
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62 | is ($query_cnt, 1, 'Single query on prefetched titles'); |
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63 | $schema->storage->debugcb (undef); |
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64 | $schema->storage->debug ($sdebug); |
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65 | } |
66 | |
67 | # Test sql by hand, as the sqlite db will simply paper over |
68 | # improper group/select combinations |
69 | # |
70 | # the exploded IN needs fixing below, coming in another branch |
71 | # |
72 | is_same_sql_bind ( |
73 | $track_rs->count_rs->as_query, |
74 | '( |
75 | SELECT COUNT( * ) |
76 | FROM ( |
77 | SELECT me.cd |
78 | FROM track me |
79 | JOIN cd cd ON cd.cdid = me.cd |
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80 | WHERE ( me.cd IN ( ?, ?, ?, ?, ? ) ) |
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81 | GROUP BY me.cd |
82 | ) |
83 | count_subq |
84 | )', |
85 | [ map { [ 'me.cd' => $_] } ($cd_rs->get_column ('cdid')->all) ], |
86 | 'count() query generated expected SQL', |
87 | ); |
88 | |
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89 | is_same_sql_bind ( |
90 | $track_rs->as_query, |
91 | '( |
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92 | SELECT me.cd, me.track_count, cd.cdid, cd.artist, cd.title, cd.year, cd.genreid, cd.single_track |
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93 | FROM ( |
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94 | SELECT me.cd, COUNT (me.trackid) AS track_count, |
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95 | FROM track me |
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96 | JOIN cd cd ON cd.cdid = me.cd |
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97 | WHERE ( me.cd IN ( ?, ?, ?, ?, ? ) ) |
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98 | GROUP BY me.cd |
99 | ) as me |
100 | JOIN cd cd ON cd.cdid = me.cd |
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101 | WHERE ( me.cd IN ( ?, ?, ?, ?, ? ) ) |
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102 | )', |
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103 | [ map { [ 'me.cd' => $_] } ( ($cd_rs->get_column ('cdid')->all) x 2 ) ], |
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104 | 'next() query generated expected SQL', |
105 | ); |
106 | |
107 | |
108 | # add an extra track to one of the cds, and then make sure we can get it on top |
109 | # (check if limit works) |
110 | my $top_cd = $cd_rs->slice (1,1)->next; |
111 | $top_cd->create_related ('tracks', { |
112 | title => 'over the top', |
113 | }); |
114 | |
115 | my $top_cd_collapsed_track = $track_rs->search ({}, { |
116 | rows => 2, |
117 | order_by => [ |
118 | { -desc => 'track_count' }, |
119 | ], |
120 | }); |
121 | |
122 | is ($top_cd_collapsed_track->count, 2); |
123 | |
124 | is ( |
125 | $top_cd->title, |
126 | $top_cd_collapsed_track->first->cd->title, |
127 | 'Correct collapsed track with prefetched CD returned on top' |
128 | ); |
129 | } |
130 | |
131 | # test a has_many/might_have prefetch at the same level |
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132 | # Note that one of the CDs now has 4 tracks instead of 3 |
133 | { |
134 | my $most_tracks_rs = $cd_rs->search ({}, { |
135 | prefetch => 'liner_notes', # tracks are alredy prefetched |
136 | select => ['me.cdid', { count => 'tracks.trackid' } ], |
137 | as => [qw/cdid track_count/], |
138 | group_by => 'me.cdid', |
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139 | order_by => { -desc => 'track_count' }, |
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140 | rows => 2, |
141 | }); |
142 | |
143 | is_same_sql_bind ( |
144 | $most_tracks_rs->count_rs->as_query, |
145 | '( |
146 | SELECT COUNT( * ) |
147 | FROM ( |
148 | SELECT me.cdid |
149 | FROM cd me |
150 | LEFT JOIN track tracks ON tracks.cd = me.cdid |
151 | LEFT JOIN liner_notes liner_notes ON liner_notes.liner_id = me.cdid |
152 | WHERE ( tracks.cd IS NOT NULL ) |
153 | GROUP BY me.cdid |
154 | LIMIT 2 |
155 | ) count_subq |
156 | )', |
157 | [], |
158 | 'count() query generated expected SQL', |
159 | ); |
160 | |
161 | is_same_sql_bind ( |
162 | $most_tracks_rs->as_query, |
163 | '( |
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164 | SELECT me.cdid, me.track_count, tracks.trackid, tracks.cd, tracks.position, tracks.title, tracks.last_updated_on, tracks.last_updated_at, liner_notes.liner_id, liner_notes.notes |
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165 | FROM ( |
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166 | SELECT me.cdid, COUNT( tracks.trackid ) AS track_count |
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167 | FROM cd me |
168 | LEFT JOIN track tracks ON tracks.cd = me.cdid |
169 | WHERE ( tracks.cd IS NOT NULL ) |
170 | GROUP BY me.cdid |
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171 | ORDER BY track_count DESC |
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172 | LIMIT 2 |
173 | ) me |
174 | LEFT JOIN track tracks ON tracks.cd = me.cdid |
175 | LEFT JOIN liner_notes liner_notes ON liner_notes.liner_id = me.cdid |
176 | WHERE ( tracks.cd IS NOT NULL ) |
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177 | ORDER BY track_count DESC, tracks.cd |
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178 | )', |
179 | [], |
180 | 'next() query generated expected SQL', |
181 | ); |
182 | |
183 | is ($most_tracks_rs->count, 2, 'Limit works'); |
184 | my $top_cd = $most_tracks_rs->first; |
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185 | is ($top_cd->id, 2, 'Correct cd fetched on top'); # 2 because of the slice(1,1) earlier |
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186 | |
187 | my $query_cnt = 0; |
188 | $schema->storage->debugcb ( sub { $query_cnt++ } ); |
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189 | $schema->storage->debug (1); |
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190 | |
191 | is ($top_cd->get_column ('track_count'), 4, 'Track count fetched correctly'); |
192 | is ($top_cd->tracks->count, 4, 'Count of prefetched tracks rs still correct'); |
193 | is ($top_cd->tracks->all, 4, 'Number of prefetched track objects still correct'); |
194 | is ( |
195 | $top_cd->liner_notes->notes, |
196 | 'Buy Whiskey!', |
197 | 'Correct liner pre-fetched with top cd', |
198 | ); |
199 | |
200 | is ($query_cnt, 0, 'No queries executed during prefetched data access'); |
201 | $schema->storage->debugcb (undef); |
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202 | $schema->storage->debug ($sdebug); |
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203 | } |